I have a Linux box I use for file storage. I built it a few years ago with another distro (PCLOS), and it worked well enough. It was configured with a 40gig HD for the OS, and a RAID card running 5 500 gig drives for data (roughly 2 TB usable space). This showed up in PCLOS as a single ~2TB drive, as it should.

Recently the OS drive died. Complete failure. I replaced the drive and installed Mint 10 Julia (because it fits on a CD). My BIOS sees the RAID drive as usual, but Mint does not see the RAID drive at all.

What's worse, it did at first. For about a day. Now it does not see it at all. Hmmm. Grain of salt time. My wife says it did, but I don't recall...

Following directions in another thread, I've run the following commands with these results:

No, it doesn't show up there, either, but in checking just now, I found my BIOS settings are off from what I had set yesterday. I verified all my boot order settings, etc., yesterday, and noticed that the clock was way off. I corrected it, and it's way off again this morning. Also, BIOS is NOT seeing the RAID card today.

Looks like a CMOS battery is dying (I hope). I'll get that corrected before I take up any more of your time! That might be the whole story.